AN3375 datasheet(61/73 Pages) STMICROELECTRONICS

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AN3375

M24LRXX-R Layer

Doc ID 018637 Rev 1

61/73

4.4

M24LRXX-R specific functions

4.4.1

M24LRXX_WriteSectorPassword function

This function sends a Write Sector Password command to a contactless tag. It is specific to

M24LRXX-R devices. For more information, please refer to the M24LR64-R datasheet.

4.4.2

M24LRXX_LockSectorPassword function

This function sends a Lock Sector Password command to a contactless tag. It is specific to

M24LRXX-R devices. For more information, please refer to the M24LR64-R datasheet.

Table 94.

M24LRXX_WriteSectorPassword function description

Function description

Protocol

result = int8_t M24LRXX_WriteSectorPassword

(uc8 Flags, uc8 *UIDin, uc8

PasswordNumber,uc8 *Password,uc8 AppendCRC,

uc8 *CRC16,uint8_t *pResponse );

Input parameter

Flags: request flags

UIDin: pointer on contactless tag UID

PasswordNumber: password index

Password: password to write into contactless tag

AppendCRC: CRC16 management

CRC16: pointer to user CRC16

Output parameter

pResponse: pointer to CR95HF response

Return parameter

ERRORCODE_GENERIC: a parameter value is erroneous or

CR95HF returns an error code

RESULTOK: CR95HF returns a succeeded code

Table 95.

M24LRXX_LockSectorPassword function description

Function description

Protocol

result = int8_t M24LRXX_LockSectorPassword

(uc8 Flags, uc8 *UIDin, uc8

*SectorNumber,uc8 SectorSecurityStatus,uc8

AppendCRC, uc8 *CRC16,uint8_t *pResponse );

Input parameter

Flags: request flags

UIDin: pointer on contactless tag UID

SectorNumber: sector index

SectorSecurityStatus: security status of the block

AppendCRC: CRC16 management

CRC16: pointer to user CRC16

Output parameter

pResponse: pointer to CR95HF response

Return parameter

ERRORCODE_GENERIC: a parameter value is erroneous or

CR95HF returns an error code

RESULTOK: CR95HF returns a succeeded code

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